package com.guo.boot.study.gaoji;

/**
 * @Auther Heart Guo
 * @Date 2021/12/23-18:19
 */
/*
    测试：生产者消费者问题2：信号灯法，一般通过标志位解决

* */
public class TestPC2 {
    public static void main(String[] args) {
        TV tv = new TV();
        new Player(tv).start();
        new Watcher(tv).start();
    }
}

//生产者--演员
class Player extends Thread{
    TV tv;
    public Player(TV tv){
        this.tv = tv;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            if(i%2==0){
                this.tv.play("郭德纲相声");
            }else {
                this.tv.play("广告一大堆");
            }
        }
    }
}
//消费者--关众
class Watcher extends Thread{
    TV tv;
    public Watcher(TV tv){
        this.tv = tv;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            tv.watch();
        }
    }
}

//产品--节目
class TV{
    //演员表演的时候，观众等待 T
    //观众观看的时候，演员等待 F
    String voice;//表演的节目
    boolean flag = true;
    //表演
    public synchronized void play(String voice){
        if(!flag){
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("演员表演了："+voice);

        //通知观众观看
        this.notifyAll();
        this.voice = voice;
        this.flag = !this.flag;


    }

    //观看
    public synchronized void watch(){
        if (flag){
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("观众观看了:"+voice);
        //通知演员表演
        this.notifyAll();
        this.flag = !this.flag;

    }
}


